Maths help
find the range of possible values of b for which 2x^2 + bx -9 =0 has :
A) no real roots
B) two equal roots
C) two distinct real roots
Thanks in advance
A) no real roots
B) two equal roots
C) two distinct real roots
Thanks in advance
No real roots means that the discriminant (b^2-4ac) is smaller than 0.
Two equal roots means that the discriminant is equal to 0.
Two distinct roots means discriminant is bigger than 0.
Two equal roots means that the discriminant is equal to 0.
Two distinct roots means discriminant is bigger than 0.
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